Sakonji Urokodaki

thumb|Sakonji's no-nonsense attitude towards training.|left As a trainer and former Demon Slayer, Sakonji is pragmatic, strict, and vigilant, while simultaneously sympathetic and understanding. When first meeting Tanjiro, he was quick to criticize him for his weak resolve and innate kindness, harshly telling him the solution to when Nezuko eats someone is to kill her and then himself. He possessed a no-nonsense demeanour while training Tanjiro, repeatedly kicking, beating, and harshly instructing him to get his bearings together and get things quickly and properly; he even began to utilize traps armed with knives and spikes when Tanjiro began to improve his descent of his mountain. That said, he became incredibly proud of the Demon Slayer Tanjiro would become. thumb|Sakonji embraces Tanjiro after he returns. As a cultivator who had lost so many student over the years, Sakonji was haunted by his association with the Hand Demon, realizing it had been the demon to kill his past 13 students. He flatly told Tanjiro that he had no intention of sending him to Final Selection and believed the giant boulder he had set on the boy was too big to cut. Taken aback by his student's accomplishment, he hugged him and told him to come home. Upon seeing that Tanjiro would indeed return from Final Selection, Sakonji embraced him and cried in relief. He also commended him for being the one to kill the Hand Demon. He showed great dedication to Nezuko, attempting, and successfully, to implant suggestions within her to protect humans and kill demons. He wrote to Kagaya Ubuyashiki his belief that Nezuko was completely able to withstand her hunger of humans, even putting his own life on the line by promising to commit sepukku should the occasion ever arise.

Sakonji is a reasonably tall elderly man with fair skin tone, as noted by the countless number of students he has trained, along with his silver-colored hair. His face has never once been revealed or depicted throughout the entire completed manga; he is always seen wearing a tengu mask that covers his entire face although Tanjiro states through a Taisho Secret that Sakonji's face is very gentle and calm. He is always seen wearing a blue, cloud-patterned jinbei kimono with navy colored pants which are fastened at his shins by white kyahan guards. He also wears traditional black tabi socks, and sandals similar to Tanjiro, except his sandals have blue straps. On the occasions when Sakonji travels, he wears a white cloth that covers his head and wraps around his neck. When he was younger, his hair was black and fashioned into a topknot.

Overall Abilities
thumb|Sakonji training a young Giyu Tomioka, the future Water Hashira. As the former Water Hashira, he was once one of the Demon Slayer Corps' most powerful fighters. He singlehandedly captured and imprisoned the Hand Demon on Mt. Fujikasane, a notable feat considering the presumed challenge of disabling the powerful demon without killing it. As the cultivator of Water Breathing, he is both incredibly knowledgeable and an accomplished teacher, having trained at least 14 students in the art. Even in his old age, a young and physically fit Tanjiro barely kept up with him while running and Sakonji was strong enough to flip him over and fend his attacks off without exertion. Enhanced Stealth: Sakonji possesses a light footstep while moving, which was noted by Tanjiro during his attempt to follow him back to Mount Sagiri. Even while running at a considerable pace, his feet barely made a sound. Hand to Hand Combat: Sakonji has shown to be highly skilled in hand-to-hand combat, which he used to toss and throw Tanjiro during his training, despite Tanjiro being armed with a sword and charging at him with full speed.